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The existence of autotrophs made a place for heterotrophs, which use energy that has already been captured by autotrophs. It is not clear how photosynthesis got started, although it is a combination of two systems that can be found singly in some life forms that.
Human beings like to believe they are in control of their destiny, but when the history of life on Earth is seen in perspective, the evolution of Homo sapiens is merely a transient episode that acts to redress the planet's energy balance. Ever since Malthus.
The control of fire and the exploitation of fossil fuels have made it possible for Homo sapiens to release, in a short time, vast amounts of energy that accumulated long before the species appeared. By using extrasomatic energy to modify more and more of its.
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But the history of life involves competition among species, with new species evolving and old ones dying out. In this context, one would expect populations to fluctuate, and for species that have been studied, they generally do (ecology texts such as Odum, 1971 and Ricklefs.
Australia or Japanese beetles in the United States. The world's present population of over 5.5 billion is sustained and continues to grow through the use of extrasomatic energy. But the exhaustion of fossil fuels, which supply three quarters of this energy, is not far off.
If there are survivors, they will not be able to carry on the cultural traditions of civilization, which require abundant, cheap energy. It is unlikely, however, that the species itself can long persist without the energy whose exploitation is so much a part of its.
More and more carbon wound up under the ground, with a greater and greater amount of oxygen in the earth's atmosphere. This separation of carbon and oxygen from a primeval atmosphere in which carbon dioxide and water were abundant represents a vast accumulation of solar.
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